You have nothing to worry about. Customs people don't care about personal effects such as these. The only way you could run into trouble is if it looked like you were trying to supply a store somewhere, but really, even if you have a couple dozen used pipes in your bag, they'll just look at you and tell you to have a nice trip.
Tobacco has some restrictions in quantity, but even this is very hit and miss as I've never had a problem. I'd say anything under a pound and you'll probably be ok, even if it is over their legal limit. Most of the time they just don't care, especially if it is for personal use.
I've travelled from Canada to Brazil several times in the past couple of years with my pipes and tobacco. I've also been from Brazil to Europe (Germany) a few times (including right now) without problems concerning customs being worried about my pipes. Honestly, your chances of being searched alone are so remote that you'll wonder why you spent so much time worrying about it as you're cruising through the gates with your stash.
It's not like you're trying to import high grade heroin, so I'd just forget about it and enjoy your smoke in Europe. By the way, you'll probably have so many options of tobacco in France that I wouldn't take much with me anyway. I'm smoking all the full virginia flake I can handle as it's on every shelf and well stocked here! Same goes with some other hard to get blends that aren't available so easily in ol' America.
No worries!